granuloma

gran·u·lo·ma

(grăn′yə-lō′mə)

n.pl.gran·u·lo·mas or gran·u·lo·ma·ta(-mə-tə)

Any of various nodular masses of granulocytic monocytes and other immune cells, including macrophages and eosinophils, that aggregate in response to a chronic infection, such as tuberculosis, or other inflammatory process.

gran′u·lo′ma·tous(-mə-təs) adj.

granuloma

(ˌɡrænjʊˈləʊmə)

n, pl-masor-mata (-mətə)

(Pathology) a tumour composed of granulation tissue produced in response to chronic infection, inflammation, a foreign body, or to unknown causes

But if they don't and are also painful or if you also have other symptoms, they could be a sign of sarcoidosis - a condition where cells clump together to form small lumps of inflammation and scarring called granulomas.

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